It was likely left exposed on the open internet by a third party.

Described by Thomson Reuters as a "global screening solution," the World-Check service, which relies on information from all over the world, is designed to give deep insight into financial crime and the people potentially behind it.

"We monitor over 530 sanction, watch and regulatory law and enforcement lists, and hundreds of thousands of information sources, often identifying heightened-risk entities months or years before they are listed. In fact, in 2012 alone we identified more than 180 entities before they appeared on the US Treasury Office of Foreign Assets Control (OFAC) list based on reputable sources identifying relevant risks," the Thomson Reuters website reads.